2006 Dodge Diesel 2500-A/C working perfect one day and the next day, blowing hot air. Started working a couple of different times then went back to blowing hot air. TIPM?

It's an electrical issue as I've been trying to get to the bottom of mine for a while. I have a new switch, blower, actuators, actuator motors, compressor, accumulator, etc all new in my truck. The ac turns off on its own and back on by itself. It even affects the switch for the heated mirrors. After I installed my new ac system, I then connected my Autel shop scanner to my truck to try to pinpoint the issue which is electrical. I'll be more than happy to share what it is once I find the exact problem

You may need to replace the reostat in the heater box. Do you have the hi speed only? Only have off and I, then it is definitely that switch in your box. You can easily replace it.

sounds like a bad ground

low coolant. disconnected or faulty servo to control difference between hot and cold or the heater core could be clogged. if it warms up when reving the engine then it is probably low coolant.

You need to check your vaccum pump and hoses

I have the same truck with the same exact problem. Mine also stopped blowing while pulling a camper and indeed it is the clutch on the A/C. I was told if you can find someone in your area that can actually rebuild the compressor and not put a new one in you can come out alot cheaper! Also if you crank your truck and turn the A/C on look under the truck on the passenger side at the compressor and take a tool of small hammer and tap the compressor in the middle and it should come on and run the a/c for a little while! I did this until it finally went out and it worked! Might buy you some time!

Mine was stuck in 4low. What a nightmare as I was out camping and had to tow my 5th wheel back to town at 40mph. Dodge says it is a stuck switch. At the same time though my A/C stopped blowing cold air. Checked on a couple of Google posts and found that this is a known problem. Apparently theTIPM (Total Integrated Power Module)is the culpruit. Everything seems to run through this.

check fuses and relays

it sounds more like the thermostat, a thermostat will cost around 8 to 12 dollars,just remove the thermostat housing and replace the old thermostat then reinstall the housing

sounds like you got a low coolant problem....any signs of a leak...check the coolant level